Need homework help ASAP! (Biology)

[JAD]

God I hate Biology with a passion :p we got this really hard homework assignment that is worth 131 points and it's not a completion grade and I needed some help on some of this stuff. Any help on any of these questions is appreciated. Thanks.

This is for a frog disection lab report to let you know :)


5. What structure in a frog serves the function of the diaphragm in a human?

6. Why do you think the tadpole has a two-chambered heart, whereas the adult frog has a three-chambered heart?

7. What organ besides the kidneys regulates salt and water balance in amphibians?

8. What major physical changes occur in the metamorphosis from the tadpole stage to the adult stage that enable the adult frog to survive on land?

10. Compare the structure and function of the frog's and the human's respiratory and circulatory systems.



Any help would be awesome! I will ++ rep you and love you forever! :p

Thanks a lot,

~JAD

[isjusme]

1. A slender tube that connects the tympanic cavity with the nasal part of the pharynx and serves to equalize air pressure on either side of the eardrum. ( I do not know if this applies to frogs lol, it applies to humans and I would assume that it goes to the same place.)
2. The pharynx
3. On humans the glottis is used for some sounds /h/ /f/ /k/ are examples. Maybe it is for croaking? o.0
4. Last I checked the Lymphatic system
5. Don't know sorry
I don't know anything else, but wikipedia might be a handy source for information ^^ Hope i helped some :P
9. For winter I think they go underground or something
Also some answers were taken from google cause I actually don't care about any of that stuff enough to know what it actually is. yay for google

[Santa_Clause]

1. Where do the Eustachian tubes lead, and what is their function? They lead to the pharynx and the ears, equalising pressure in the inner ear.

3. What is the function of the glottis? Breath and vocalise.

4. Which system is the spleen part of? Lymphatic and cardiovascular system.

Google :D

Edit: Hah! Isjusme found same answers.

[JAD]

1. A slender tube that connects the tympanic cavity with the nasal part of the pharynx and serves to equalize air pressure on either side of the eardrum. ( I do not know if this applies to frogs lol, it applies to humans and I would assume that it goes to the same place.)
2. The pharynx
3. On humans the glottis is used for some sounds /h/ /f/ /k/ are examples. Maybe it is for croaking? o.0
4. Last I checked the Lymphatic system
5. Don't know sorry
I don't know anything else, but wikipedia might be a handy source for information ^^ Hope i helped some :P
9. For winter I think they go underground or something
Also some answers were taken from google cause I actually don't care about any of that stuff enough to know what it actually is. yay for google

zomg tyvm!! :) (Rep ++!)

Still need help with the ones up there for anybody else that can help. Thanks.

[drizzt]

hmm..maybe the answer to #5


there are no ribs or diaphragm to support breathing. Frogs breathe by taking air in through the nostrils (causing the throat to puff out), and compressing the floor of the mouth, which forces the air into the lungs.

so as a replacement for a diaphragm, they compress the floor of their mouth i would think

[King of the Nites]

This is kind of offtopic, but what grade level is this for??

[JAD]

This is kind of offtopic, but what grade level is this for??

Biology 250, for regular sophomores or honors (advanced) freshman (I'm a freshman).

And tyvm drizzt :)

[Brain]

Drizzt is correct, no diaphram, they use the thing under their mouth (lower lip) to pump air, they also do some cutaneous gas exchange (breathing through the skin)

While some of the answers the first person wrote sound kinda iffy...no offense, but they sound funny....

5. The skin under their mouth (I'm sure you've seen them pumping it, they use that to regulate the pressure, they pump it into their lungs rather than suck it in like we do.

6. The three chambered heart is more efficient and meets the needs of the more active frog. You could also mention something about there being no buoyancy outside of the water (where the frog is) so his heart has to be stronger to counter act the force a gravity on his blood.

7. Could very possibly be the skin, not positive though, but I know that most animals use their skin as an excretory organ (yes even us, uric acid comes out, which is the main ingredient in...you guessed it, urine)

8. The transformation of gills to lungs, and of course all the main anatomical changes, such as legs and stuff! (not a good answer, sorry, but some ideas)

9. Alright....humans have a much more efficient 4 chambered heart, 2 atria and 2 ventricles, right vent' goes to the lungs, left goes to the body. Atria accept blood from the lungs/body...in the FROG they only have 3 chambers, two atria, and a ventricle (I believe). This single ventricle allows for some mixing of oxygenated with the deoxygenated blood, which is bad for efficiency. The frogs also do some gas exchange (see above) through their skin, which is why they have to keep it clean, and are very prone to pollution killing them :( poor frogs

I did not get any of these answers from the internet, I passed AP (advanced placement) Biology last year, got an A in the class, and a 5 (top score) on the AP Exam. Some of these answers may not be correct, I suggest you look in your book to confirm them. Previous to AP Bio I took 2 years of lower level Bio, Dissecting frogs twice....and....I LOVE BIO!!!! :D
good luck on your test/quiz/paper thing :p

p.s. Bio is cool